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Radiology, Vol 164, 89-91, Copyright © 1987 by Radiological Society of North America

ARTICLES

Myelinated and nonmyelinated nerves: comparison of proton MR properties

FA Jolesz, JF Polak, DF Adams and PW Ruenzel

The magnetic resonance (MR) relaxation rates of protons were compared in the myelinated and nonmyelinated nerves of the garfish. The long, large olfactory nerve of the garfish, as an easily accessible source of nonmyelinated axons, is uniquely suited for such a comparison. The T1 and T2 measurements revealed distinct and consistent differences between nonmyelinated olfactory nerves and myelinated optic and oculomotor nerves. Comparisons between water content, lipid content, and relaxation rates indicated that the differences in MR properties represent complex differences in the distribution and physical environment of the constituent lipid and water protons.




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